Linux, Mac, Windows
The user manual introduces you to the main elements of the Marble Desktop application (KDE and Qt version). You can open it from within Marble using the
F1 shortcut (and from the
Help menu). You can also access it online at docs.kde.org.
Does the user manual not answer your question? The following resources may be helpful as well.
You can also get in touch with other users and Marble developers.